Measurement of the magnetic field and wall motion of hohlraum materials for the MagNIF platform *

The MagNIF experimental platform at the National Ignition Facility (NIF) is developing the technology necessary to apply a magnetic field to a deuterium-tritium fuel layer in an indirect-drive inertial confinement fusion (ICF) target.  Simulations suggest that application of a seed magnetic field exceeding 25 T will increase the implosion ion temperature and neutron yield.  The hohlraum material needs to allow the magnetic field to penetrate with minimal loss of energy into the hohlraum itself to prevent motion and heating of the hohlraum wall.  We will present measurement of the magnetic field and wall motion of both gold and a tantalum-gold alloy hohlraums.  We will demonstrate that the tantalum-gold alloy is suitable for use in a MagNIF experimental platform.